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SIR$–Symbolic Input/Output Routine
Word 0
S1
S2
S3
S6
050 is the SDF label identifying this as an SDF element.
indicates that a 1-word image follows.
the Fieldata character 'S' identifies this as an SIR$-created file or element.
indicates the CCS of the data records that follow (see Appendix H).
If SIR$ writes a source output element, the element is identified as a Fieldata element if
the label control record CCS is zero; otherwise, it is identified as an ASCII element.
SIR$ Line-Change Control Record
When SIR$ applies runstream corrections to the source input, SIR$ line-change control
records are written to the source output and passed to the calling program. Note that
these are control records that SIR$ writes to the source output; if SIR$ line-change
control records are read in the source input, they are discarded by SIR$.
SIR$ produces two types of SIR$ line-change control records, both of which may be
present in source output produced by SIR$.
The first type contains the actual text of the runstream line change statement or partial
line change statement. It is used primarily by processors when producing
comprehensive 'V' option listings of source input line numbers and runstream
corrections. The control record format follows.
0 5 6 11 18 35
0 052 n 0
1 line-change statement
..
n
23–4 7833 1733–004